hotfix/source/openejb-core_4.5.2/src.original/main/java/org/apache/openejb/core/security/jaas/UserPrincipal.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.openejb.core.security.jaas;

import org.apache.openejb.spi.CallerPrincipal;

import java.security.Principal;

/**
 * @version $Rev: 1153797 $ $Date: 2011-08-04 09:09:44 +0000 (Thu, 04 Aug 2011) $
 */
@CallerPrincipal
public class UserPrincipal implements Principal {

    private final String name;
    private transient int hash;

    public UserPrincipal(String name) {
        if (name == null) throw new IllegalArgumentException("name cannot be null");
        this.name = name;
    }

    public String getName() {
        return name;
    }

    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        final UserPrincipal that = (UserPrincipal) o;

        if (!name.equals(that.name)) return false;

        return true;
    }

    public int hashCode() {
        if (hash == 0) {
            hash = name.hashCode();
        }
        return hash;
    }

    public String toString() {
        return name;
    }
}